Sewing-machine.



Patented May 8, 1917.

MIIIIIIIII III IIIII C. l. CADY.

SEWING MACHINE. APPLICATION FILED AuG.27. 1915.v

narran sraras ritratta ernten CARSON J'. CADY, OF ROCHESTER, NEW YORK,ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, ACORPORATION OF NEW JERSEY.

SEWING-MACHINE.

Specification of Letters Patent.

Application led August 27', 19715. Serial No. 47,621.

.Be it known that I, @Anson J. Canv, a citizen of the United States,residing at Rochester, in the county of Monroe and State of New York,have invented certain new and useful Improvements in Sewingl'lachincs;and I do hereby declare the following to be a full, clear, and exactdescription of the invention such as will enable others skilled in theart to which it appertains to make and use the same.

The present invention relates to wax thread shoe sewing machines, andmore particularly to mechanism employed in connection with such machinesfor grooving the sole of a boot or shoe.

In the type of machine in which the present invention is embodied thepresser foot is maintained in engagement with the work during theformation of a stitch and is entirely removed from engagement with thework during the feeding movement.

An object of the present invention is to provide a grooving knife whichis supported upon the presser foot and is permanently maintained inoperative relation to the sole independently of the position of thepresser foot. With this object in view a feature of the inventionconsists in the combination with a presser foot and actuating mechanismof a grooving knife supported upon the presser foot and movable relativethereto, and means for maintaining the grooving knife in engagement withthe work when the presser foot is elevated. Still further features of.the invention consist in certain novel features of construction,combinations and arrangements of parts hereinafter described andclaimed, the advantages of which will be obvious to those skilled in theart from the following description.

In the accompanying drawings illustrating the preferred form of theinvention; Figure 1 represents a side elevation of a sewing machineembodying the invention; Fig. 2 is a detail illustrating a sectionalelevation of the grooving knife in the position which it occupies whenthe presser-foot is elevated; and Fig. 3 is a view similar to Fig. 2illustrating the position of the grooving knife when the presser-foot isdepressed into contact with the work.

The machine shown in the illustrated embodiment of the 4invention issubstantially the same as that disclosed in the application of Ashworth,Serial No. 769,566, liled May 24, 1913. This machine comprises a worksupport 1, and a coperating presser-foot 2 which is mounted upon one endof a presser-foot lever 4L fulcrumed at 5. The presser-foot is actuatedduring the operation of the machine to iirst engage yieldingly with thework, is then positively moved a predetermined distance to clamp thework during the formation of a stitch, and is then elevated and retainedin this position during the feeding movement of the work, after whichthe cycle of operations-is repeated. In order to accomplish thismovement of the presser-foot, the lower end of the presserfoot lever isconnected through a link 7 with an actuating lever S pivoted between itsends to a controlling bar 9 which is locked at predetermined intervalsin a head 10 through a locking device indicated generally at 11. rI`helower end of the actuating lever S is connected through a link 12 with atension spring 13 which normally tends to swing the presser-foot leverin a direction to move the presser-foot into engagement with the work.The upper end of the actuating lever 8 is connected to the usualoperating lever 15 through a link 16 to cause the operation of theactuating lever from a rotary cam disk 17. At the completion of thefeeding movement of the work, the controlling bar 9 is free to move andthe spring 13 accordingly swings the actuating lever 3 about theconnection with the link 16 to move the presser-foot into yieldingengagement with the work. rIhe controlling bar is then locked inposition and the cam disk 17 operates through the lever 15 to swing theactuating lever about the connection with the bar 9 to move thepresser-foot a predetermined distance and positively clamp the work. Thelock 11 is controlled in the usual manner through a curved lever 2OYfulcrumed at 21 and connected to the locking lever through a link 23.The lever 20 is normally maintained in position to lock the bar througha spring 25 connected with the opposite end of the lever 20, and isunlocked through an arm 2G operatively connected with a rotary cam. Theforegoing construction is subtantially the same as that shown anddescribed in the application above referred to, and in consequence hasbeen only briefly described herein.

With this type of machine it is desirable Patented May 8, 1917.

toprovide mechanism for forming a groove in the surface of the outsole,and in the simplest and most efficient form of the invention which hasyet been devised the grooving tool is supported in the presser-foot andis movable relative thereto. The grooving tool is provided with meansfor normally moving it toward the surface of the work as thepresser-foot .is elevated and with means for lin'iiting this movement.in the direction of the work. To this end, as shown clearly in Figs. 2and 3, the presser-foot is provided with a recess 3() in which agrooving tool 3l is slidingly supported. The upper end of the groovingtool is provided. with an enlarged cylindrical shank 33 and a smallerrectangular portion Silterminating in the end of the tool. The shoulderthus formed by the two portions 253 and 34 is arranged to engage with acooperating shoulder 35 formed in the recess 3() to limit the movementof the tool toward the work when the presser-foot elevated. ln order toprevent a` turning movement of the grooving tool in the presser-foot,the lower portion of the recess 30 is rectangular in shape,corresponding with the shape of the portion 34. rl`he grooving tool isnormally depressed by a spring 37 which is interposed between the upperend of the grooving tool and a stud 38 threadedly mounted in the upperend of the recess and having a depending stem 40 to guide the spring 37.ln this type of machine the feeding of the work occurs only when thepresser foot is lifted and the grooving tool is retained by the spring37 in the position shown in Fig. 2 of the drawings. When the presserfoot engages with the work the grooving tool is held in the recessagainst the action of the spring 37 in the position shown in Fig; 3, andno feed of the work occurs to cause the formation of a groove by thetool. This mechanism provides a simple and compact construction forforming a continuous groove of uniform depth in the surface of theoutsole, while Copies of this patent may be obtained for permitting thepresser-foot to be entirely removed from engagement with the workduring` the feeding movement. i

Vhile it is preferred to employ the specic construction and arrangementof parts shown and described, it will be understood that thisconstruction and arrangement is not essential except so far as specifiedin the claims, and may be changed or modified without departing from thebroader features of the invention.

The invention having been described, what is claimed is:

l. A sewing machine comprising a presserfoot, actuating mechanism forthe presserfoot to cause the presser-foot to clamp the work during theformation of a stitch and to entirely remove the presser-foot fromengagement with the work during the feeding movement, a grooving knifesupported by the presser-foot and movable relative thereto, and meansfor maintaining the groovingv knife in engagement with the work when thepresser-foot is elevated.

2. A sewing machine comprising a presserfoot, actuating mechanism formoving the presser-foot toward and from the work, a

grooving knife supported by the presserfoot, a spring for moving thegroovingknife toward the work when the presser-foot is removed from thework, and means for limiting the movement of the grooving knife towardthe work.

3. A sewing machine comprising a presserfoot having a recess providedwith a shoulder portion, actuating mechanism @for moving thepresser-foot toward and from the work, a grooving tool slidinglysupported in the recess and having a shoulder cooperating with theshoulder portion of the recess to limit the outward movement of the toolin the recess, and a spring for normally maintaining the grooving toolin contact with the shoulder portion of the recess.

CARSON J. CADY.

ve cents each, 'by addressing the Commissioner of latents. Washington,D. G.

